#free
READ Calculus with Julia
A free, book-length set of calculus notes by Jim Verzani that teaches calculus through the Julia language. It is a long-running, individually authored educational site that uses code for graphical and numerical illustration. It is a whole site rather than a single tutorial page.
READ Dental Scope – Interactive 3D dental anatomy
Free interactive 3D educational tool visualizing all 32 permanent teeth with multiple numbering systems (FDI, Universal, Palmer), detailed anatomy from enamel through root canals, plus jaw and nerve structures. Focused, specialized reference tool for dental education.
READ CowBull – Bulls and Cows word game
A free, multiplayer word game implementation of Bulls and Cows (like Wordle). Solo mode, shared game links, no accounts needed.
READ SkyLens — Live 3D Satellite Tracker + Declassified UAP Archive
Interactive 3D real-time satellite tracker combined with a curated archive of 375+ declassified government UAP case files, NASA asteroid tracking, and space news. Free, no signup required, RSS feed available.
READ Shoehorn — Quantize LLMs to your hardware
Interactive browser-based tool for quantizing large language models to fit your personal machine. Scans Hugging Face's most-downloaded models, estimates which ones fit your specific hardware (Mac, GPU, custom configs), visualizes memory budgets, then provides a local CLI app and web interface to run the chosen model via llama.cpp. Combines practical utility with a clean, hands-on approach to a niche problem.
READ Folding Paper Globes
Free printable paper globe templates for Earth, the Moon, Mars, and other celestial bodies, plus data visualization globes showing earthquakes, volcanoes, ocean temperature, and more. Download, print, cut, fold, and glue to create physical 3D globes.
READ OmniDeck: Indie Developer Tool Suite
Handcrafted collection of browser-based utilities (JSON formatter, password generator, QR codes, hash functions, image compression, SEO auditor, regex tester, etc.) built entirely in vanilla JavaScript. 100% client-side, free, no signup required, emphasis on privacy and zero friction.
READ RecipeTables
A handcrafted web tool that converts recipes into an innovative prep-table format (ingredients as rows, steps as merged columns), making recipes readable at a glance. Built by Juan Buis with daily improvements. Supports URL/text/image upload, library browsing, scaling, exporting, and sharing.
READ clipart.studio — magazine collage maker
A delightful digital collage tool. Pick magazines from the Internet Archive, clip pieces you want, arrange them on the page, download or submit to the public gallery. Thoughtfully designed interface with keyboard shortcuts, undo/redo, and playful aesthetics.
WhatCable: USB-C cable diagnostic tool
A free Mac app that displays USB-C cable specifications, negotiated power profiles, and e-marker data to help diagnose charging bottlenecks. Solves a real technical problem—determining whether cable, charger, or device is limiting charge speed.
READ Neil the Seal - 3D Browser Game
A free 3D browser game where you play as an elephant seal causing mischief in suburban Tasmania. Indie game with character, WASD controls, environmental interaction, and a playful vibe.
READ So You Want to Learn Physics
Hand-curated self-study physics curriculum by Susan Rigetti. A comprehensive learning guide used by 600,000+ readers to learn physics from first principles, with an updated second edition (2021).
READ Decoy Font
Interactive TTF font that combines each letter with a visual decoy, using spatial frequency separation to hide text from AI readers. Includes a working demo and free download.
READ CourtListener
Free legal research from Free Law Project. Search millions of court opinions and oral arguments.
READ Google Fonts
Free, open-source font library. Over 1,500 font families to use in web and print projects.
READ Font Squirrel
Free fonts licensed for commercial use. Also offers a webfont generator for self-hosting.
READ Khan Academy
Free education for anyone, anywhere. Math, science, computing, and more with personalized learning.
READ OSSU Computer Science
Path to a free self-taught CS education. 200K+ stars. Complete curriculum using free online courses.
READ Free Programming Books
Freely available programming books in many languages. 350K+ stars. The ultimate free learning resource.
READ Awesome Stock Resources
Collection of free stock photography, video, and illustration websites.
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Unsplash
Beautiful free images. High-quality photos contributed by photographers worldwide.
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Pexels
Free stock photos and videos. High quality, no attribution required.
READ MIT OpenCourseWare
Free MIT course materials. Lectures, notes, and assignments from real MIT classes.
READ freeCodeCamp
Learn to code for free. Full curriculum from HTML to machine learning.
READ The Odin Project
Free full-stack web development curriculum. Project-based learning path.
READ Full Stack Open
Deep dive into modern web development. University of Helsinki's free course.
READ Crafting Interpreters
Free book on implementing programming languages. Build two interpreters from scratch.
READ Eloquent JavaScript
Free book on JavaScript and programming. A modern introduction with exercises.
READ Freesound
Collaborative database of Creative Commons licensed sounds. Field recordings, synths, and effects.
READ Awesome Open Source Games
Curated list of open source games organized by genre. From FPS to puzzle games.
READ Duolingo
Free language learning. Gamified lessons in 40+ languages with millions of users.
READ Language Transfer
Free audio courses teaching thinking methods for languages. Spanish, French, German, and more.
READ Kongregate
Free browser games. Thousands of indie games playable instantly.
READ ccMixter
Creative Commons music remixes. Free music for your projects.
READ Incompetech
Kevin MacLeod's royalty-free music. Thousands of tracks for any project.
READ Bensound
Royalty-free music for videos and projects. Quality background tracks.
READ Flaticon
Free vector icons database. Millions of icons in multiple formats.
READ Game Jolt
Platform for indie games and game jams. Discover weird, wonderful games from independent developers.
READ Internet Encyclopedia of Philosophy
Peer-reviewed academic resource on philosophy. Accessible yet rigorous articles.
READ Pro Git
The official Git book. Free, comprehensive, and authoritative.
READ PortSwigger Web Security Academy
Free web security training. Learn to find and exploit vulnerabilities.
READ Darebee
Free fitness resource. Workouts, programs, and challenges with no ads or fees.
READ MIT Physics OCW
Free MIT physics courses. From mechanics to quantum field theory.
READ Feynman Lectures
Richard Feynman's legendary physics lectures. Free online edition.
READ PubMed Central
Free archive of biomedical research. Millions of full-text articles.
Sci-Hub
Free access to research papers. Controversial but used by millions.
Library Genesis
Free access to books and papers. Shadow library for research and textbooks.
READ Project Gutenberg
The original free ebook library. Over 70,000 public domain books, started in 1971.
READ LibriVox
Free public domain audiobooks read by volunteers. Thousands of classic books in audio format.
READ JSTOR Open Content
Free access to thousands of academic articles and books. Scholarly research without paywalls.
READ Open Culture
Free cultural and educational media. Courses, books, films, and more.
READ Thingiverse
3D printing model repository. Free designs for anything you can print.
READ Webtoon
Digital comics platform. Thousands of free webcomics to read.
READ Photopea
Free online photo editor that rivals Photoshop. Runs entirely in the browser, supports PSD files.
READ TinyWow
Collection of free online tools for PDFs, images, videos, and documents. No signup, files deleted after processing.